Chromium (total)
Tangipahoa Parish Water District
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 22 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 9 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-31 | AE20519 | ND |
| 2018-01-31 | AE20516 | ND |
| 2018-01-31 | AE20513 | ND |
| 2018-01-31 | AE20510 | ND |
| 2018-01-31 | AE20510 | ND |
| 2018-01-31 | AE20513 | ND |
| 2018-01-31 | AE20516 | ND |
| 2018-01-31 | AE20519 | ND |
| 2018-05-07 | AE21712 | ND |
| 2018-05-07 | AE21715 | ND |
| 2018-05-07 | AE21715 | ND |
| 2018-05-07 | AE21712 | ND |
| 2018-12-03 | B1805766-002 | ND |
| 2018-12-03 | B1805766-005 | ND |
| 2018-12-03 | B1805766-003 | ND |
| 2018-12-03 | B1805766-002 | ND |
| 2018-12-03 | B1805766-001 | ND |
| 2018-12-03 | B1805766-005 | ND |
| 2018-12-03 | B1805766-004 | ND |
| 2018-12-03 | B1805766-003 | ND |
| 2018-12-03 | B1805766-001 | ND |
| 2018-12-03 | B1805766-004 | ND |
| 2020-03-02 | B2001157-001 | ND |
| 2020-11-16 | B2006150-003 | ND |
| 2020-11-16 | B2006150-004 | ND |
| 2020-11-16 | B2006150-005 | ND |
| 2020-11-16 | B2006150-006 | ND |
| 2020-11-16 | B2006150-001 | ND |
| 2020-11-16 | B2006150-002 | ND |
| 2021-11-01 | B2105891-005 | ND |
| 2021-11-01 | B2105891-004 | ND |
| 2021-11-01 | B2105891-003 | ND |
| 2021-11-01 | B2105891-002 | ND |
| 2021-11-01 | B2105891-001 | ND |
| 2023-03-28 | B2301423-001 | ND |
| 2023-09-18 | B2303887-003 | ND |
| 2023-10-25 | B2304622-001 | ND |
| 2023-10-25 | B2304622-002 | ND |
| 2023-11-06 | B2304860-001 | ND |
| 2023-11-06 | B2304860-002 | ND |
| 2023-11-06 | B2304860-003 | ND |
| 2023-11-06 | B2304860-004 | ND |
| 2023-11-06 | B2304860-005 | ND |